we have found a strange behaviour with the i.MX535 QSB (DA9053 PMIC): After the board has been powered down (either by pressing the power button for 5s or via SW) it is not possible to power it up again. It shows the Green/Red LED normally seen when the board is powered down but it does not start up if the power button is pressed.
It is impossible to power the board up again without first removing the power supply
We have observed this with different QS Boards and also with our own board design which is based on the QSB.
Any idea why that happens?